Kobe Minato Onsen Ren is a hot-spring hotel on the Kobe waterfront that also sells day bathing for guests aged 12 and over. It has a Finnish-style dry sauna (90°C for men, 85°C for women) and a 45°C mist sauna with 100% humidity, which the venue recommends as gentler. It suggests rinsing with water at about 30°C rather than a cold plunge. Day entry is ¥2,715 on weekdays; open 6:00 to midnight.